The present disclosure relates to a biodegradable polymer dispersion containing a lactic acid-based polymer, a lactic acid-based polymer and polyethylene glycol-containing block copolymer (PEG-PLA), and a hyaluronic acid mixture, wherein the biodegradable polymer dispersion has excellent physiologic
The present disclosure relates to a biodegradable polymer dispersion containing a lactic acid-based polymer, a lactic acid-based polymer and polyethylene glycol-containing block copolymer (PEG-PLA), and a hyaluronic acid mixture, wherein the biodegradable polymer dispersion has excellent physiological activity by itself, has excellent dispersion stability of the lactic acid-based polymer, and is capable of effectively supporting active ingredients. In addition, the present disclosure relates to a composition containing the biodegradable polymer dispersion and a skin improvement system.
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1. A biodegradable polymer dispersion comprising a lactic acid-based polymer, a lactic acid-based polymer and polyethylene glycol-containing block copolymer, and a hyaluronic acid mixture. 2. The biodegradable polymer dispersion of claim 1, wherein the biodegradable polymer dispersion is spherical p
1. A biodegradable polymer dispersion comprising a lactic acid-based polymer, a lactic acid-based polymer and polyethylene glycol-containing block copolymer, and a hyaluronic acid mixture. 2. The biodegradable polymer dispersion of claim 1, wherein the biodegradable polymer dispersion is spherical particles having an average particle size of 0.01 to 30 μm. 3. The biodegradable polymer dispersion of claim 1, wherein the lactic acid-based polymer has a weight average molecular weight of 10,000 to 1,000,000 g/mol. 4. The biodegradable polymer dispersion of claim 1, wherein the lactic acid-based polymer and polyethylene glycol-containing block copolymer has a weight average molecular weight of 2,000 to 60,000 g/mol. 5. The biodegradable polymer dispersion of claim 1, wherein a weight ratio of lactic acid-based polymer to the lactic acid-based polymer and polyethylene glycol-containing block copolymer is 1:1 to 20:1. 6. The biodegradable polymer dispersion of claim 1, wherein the hyaluronic acid mixture includes hyaluronic acid, ammonium-substituted hyaluronic acid, and a hyaluronic acid oligomer having a weight average molecular weight of less than 8,000 g/mol. 7. The biodegradable polymer dispersion of claim 6, wherein the high molecular weight hyaluronic acid is contained in an amount of 50 to 90% by weight, the ammonium-substituted hyaluronic acid is contained in an amount of 1 to 10% by weight, and the hyaluronic acid oligomer is contained in an amount of 10 to 35% by weight, based on the total weight of the hyaluronic acid mixture. 8. The biodegradable polymer dispersion of claim 1, wherein a weight ratio of the hyaluronic acid mixture to the lactic acid-based polymer is 1:3 to 1:20. 9. The biodegradable polymer dispersion of claim 2, wherein the lactic acid-based polymer and polyethylene glycol-containing block copolymer (PEG-PLA) is positioned on the surface of the particles including the lactic acid-based polymer. 10. A cosmetic composition comprising the biodegradable polymer dispersion of claim 1. 11. A composition for an external preparation for the skin, comprising the biodegradable polymer dispersion of claim 1. 12. A pharmaceutical composition, comprising the biodegradable polymer dispersion of claim 1. 13. The pharmaceutical composition of claim 12, wherein the biodegradable polymer dispersion includes active ingredients inside the particles including the lactic acid-based polymer. 14. A skin improvement system, comprising the biodegradable polymer dispersion of claim 1 and a plasma device.
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